Chain post binder



Julyl, 1933. E F. BUENGER v i 1,918,451

CHAIN POST BINDER Filed oct. 4, 195o /ZZVQZ-Z/UF j@ Edward ueggyer'.

Zig-

Patented July 1.8, 1933 inimvifimn nunnenn, or CHroAeo, iLLiNoIs ,AssGNoR.To YWinsor;.aqua-'11s con;inalfvy,r

ri on CHICAGO, rLLrNorsiaCoRroRATroN or MASSACHUSETTS i PosT Application mea-octet@ 4, ieee.E semanita, listini-riv invention relatesto ai chain for chain post-bindersy i i centerline thereofin orderlto allow the links Vto properly flex or tumble when entering the hollow fclamping memberv of the binder,\ a movement which 'requiresvthe chains t o fleX at substantially afright'f angle. It will be appreciated that when the links`are connectedadjacent oneV side and the Achain 1s flexed, the links will Separate more widely upon the other side and present a broken and very uneven "surface due to the outward projection of the connecting tongues of the links.

Thev primary object of this invention isto overcome this objection, andto this end, the

links are i pivotally connected substantially -upon the center lineof the chain and the connecting tongues 'and opposite ends of the i links are beveled in order that theehain may flex as desired. This constructionreduces the uneven broken .effect upon the upper or outer sides of the chain that frequently tears or mutilates the sheets.4

Another feature resides in the entr-anceV guidesto the hollow clamping members fory uw chain. I s

The invention comprises the novel struc-- -tureand combination of parts lhereinafter described and more particularly pointed out plan View of a chain and described in the appended claims,

Y In the accompanying drawing, which illustrates a preferred form Vof thisinvention and in which similar reference numerals refer to similar features in thejdifferent views:

Figure l is a sectional view throughthe clamping members of a binder showing the i -12 provided with a mortise or groovel for chains inelevation. Y w Y Figure 2 is a fragmentary bottom or inner partly broken away inf volving this inventions View of said chain.

view of said chain.

Figure 3.

ing membersV centralgrooves 185 for receiving the tongues "10 .of the links of thechains as they pass clamping members.v

'will be noted thateach Vlink `of Figure 3 is a fragmentary side elevational f pivot pins l'that extend Y i substantially Figure 5 is anenlargedsectional view taken upon the lineV-V of Figure 6 is a fragmentary plan view of one l, UNITED STATES] ofthe entrance holeslinlthe clampingvmeniber v A for the chainf f noted thatfth'e chain involving this invention has been illustrated infconn'ectionf with the f' hollow clamping ,members and: 2 `ofi abind-f eri screw havingright'and leftshand threads Iis 4 ieuiiutlledi in the end caps Ltoffthe clamping; member ll. Suitable travelling nuts 51 arethreadedz upon the rightigmd leftl hand threaded sections of t-he screw and the inner lend [of a emerge throughsuitable ferrules 7 in the inchain 6 involving this inveng- Vtion 1s attached to,v eachf'nut.. Thesewchains ner side of one of the clamping members.` 'It if' i `will be notedthat these ferrules are slotted at i j their 4upper ends in those parts which are i nearest to the ends of the binders, and the. arv`cuate guides 18 have curved tongues A18a seatt vand overlappingthe clamped in such slots These arcuate guidesV have through the apertures. This construction providesa solid and durable backing furthe 5 out of the Posts Sare pivotedto- Achains when tumbling into and the outer ends ofthe chains and 4extend,

nuts 9 are threadedupon the outer ends of A'through the .loose-sheetsand through aperl' `turesin the clamping member 2. Headed The structure yof the chaininvolving this l n invention is morefuily illustrated-in Figures these v1igu`res, 1t

thechain has .x

2 to 5, and, in referring to atenon or tongue lOlth'at is beveledupon-its bottom as indicated atll and ak body portion receiving the tenon of''anadjacent link, the

eled upon the bottom asindicatfed at 4lit.

walls of the mortise or groovebeing also bev- These vbeveled clined. These-links are pivoteditogether by through the links in vthejcenter line of thefchain.'lv

.With this constructiomtheichain can fleX'i f i at approximately al right angle for .passing into and out of the clamping memberfl `as portions are op'positely in-l` l shown' in Figure 1, for it will be obvious that o Vat 17 (Fig. 3),

y I trally located instead of adjacent tlie'inner part of the chain, the break or separation between the links upon the outerV side of the chain when the same leXes will be much less and the tenons will project less, whereby the tendency to tear the sheets will be largely `eliminated and at thesame time the chains will pass more readily through the perfora-V tionsof the sheets. v

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without y departing from the principles of this invention, myself in lwise than necessitated by the prior art.

and I, therefore, doqnot desire limiting the patent granted hereon othertev 1() are sufficiently spaced fromv I claim as my invention. j

1. In. a loose leaf binder, a hollow clamping member, a screw within said clamping member, said clamping member having apertures with ferrules therein, the upper portions of said ferrules being slotted, arcuate post guides within said clamping member and having portions extending thru said slots and over-A portions of said clamping member,

lapping chain postsattached to said screws and eX.- tending through said apertures, a n second clamping member, and means for attaching said chainV posts to said second clamping member.

`2. In a loose lear1 binder, a'hollow clamping member having apertures, ferrules in said apertures," arcuate guides in said clamp-` ing member and extending through said apertures and havinggrooves,takeup mechanism in said clamping member, andchains attached to said take-up mechanism andjex-v tending` through said apertures, said chains consisting of Y links having. 'tongues ,adapted for entering the grooves in saidr guideswheii said chains pass through said errules.l

kil() EDWARD F, BUENGER.,

i io

ist 

